SOLUTION: A cube-shaped water canister has sides of 90cm and weighs 135kg when it's full. How much would it weigh if it had sides of 30 cm?

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Question 974615: A cube-shaped water canister has sides of 90cm and weighs 135kg when it's full. How much would it weigh if it had sides of 30 cm?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Full or empty or between full and empty?

If full, then the area controls the mass for the canister, and the volume controls the mass for the water.



The big canister weights 135 kilograms. You still have a proportion.
%286%2A30%2A30%29%2F%286%2A90%2A90%29 is what you really have as a conversion.

Same as 9%2F81=1%2F9.

n%2F135=1%2F9

n=135%2F9

n=15 kg.